Place lamb, fat side up, on a rack in the prepared roasting pan. Spread garlic mixture evenly over the lamb, rubbing in thoroughly into the scored cuts.

Insert both probes of your Smartro Digital Cooking Thermometer in the thickest areas of the lamb, avoiding bones. Set to your desired doneness (rare, medium, well done etc.) on the thermometer. Place into oven and roast until the thermometer alerts for doneness. Let rest 15 minutes before slicing.